Datasheet LTM4650A (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Dual 25A or Single 50A DC/DC μModule Regulator with 1% DC Accuracy |
| Pages / Page | 38 / 1 — FEATURES. DESCRIPTION. Dual 25A or Single 50A Output. Input Voltage … |
| File Format / Size | PDF / 2.3 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Dual 25A or Single 50A Output. Input Voltage Range: 4.5V to 16V. Output Voltage Range: 0.6V to 5.5V
Model Line for this Datasheet
Text Version of Document
LTM4650A Dual 25A or Single 50A DC/DC µModule Regulator with 1% DC Accuracy
FEATURES DESCRIPTION
n
Dual 25A or Single 50A Output
The LTM®4650A is a dual 25A or single 50A output switching n
Input Voltage Range: 4.5V to 16V
mode step-down DC/DC µModule® (micromodule) regula- n
Output Voltage Range: 0.6V to 5.5V
tor with ±1% total DC output error. Included in the package n
±1% Maximum Total DC Output Error Over Line,
are the switching controllers, power FETs, inductors and
Load and Temperature
all supporting components. Operating from an input volt- n
Higher Light Load Efficiency and Wider V
age range of 4.5V to 16V, the LTM4650A supports two
OUT Range Than LTM4650-1
outputs with an output voltage range of 0.6V to 5.5V, each n
Differential Remote Sense Amplifier
set by a single external resistor. Its high efficiency design n delivers up to 25A continuous current for each output.
Current Mode Control/Fast Transient Response
n Fast internal control loop compensation allows for fast
Multiphase Parallel Current Sharing Up to 300A
n transient response to minimize output capacitance when
Internal Temperature Monitor
n powering FPGAs, ASICs, and processors.
Pin Compatible with the LTM4620A (Dual 13A, Single 26A) and LTM4630A (Dual 18A, Single 36A)
Fault protection features include overvoltage and over- n Adjustable Switching Frequency or Synchronization current protection. The LTM4650A is offered in 16mm n Overcurrent Foldback Protection × 16mm × 4.41mm LGA and16mm × 16mm × 5.01mm n Selectable Burst Mode® Operation, Pulse-Skipping BGA packages. Mode Operation
LTM4650 Product Family Selection Table
n Soft-Start/Voltage Tracking
VIN VOUT COMPEN- DC VOUT
n Output Overvoltage Protection
RANGE RANGE IOUT SATION ACCURACY
n 16mm × 16mm × 4.41mm LGA and LTM4650 Internal 1.5% 16mm × 16mm × 5.01mm BGA Packages 4.5V to 0.6V to LTM4650-1B 15V 1.8V External LTM4650-1A 25A × 2 0.8%
APPLICATIONS
LTM4650A 4.5V to 0.6V to Internal 16V 5.5V 1% LTM4650A-1 External n Telecom and Networking Equipment All registered trademarks and trademarks are the property of their respective owners. Protected n Storage and ATCA Cards by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending. n Industrial Equipment
TYPICAL APPLICATION 50A, 3.3V Output DC/DC µModule Regulator 3.3VOUT Efficiency vs IOUT
10k 100 INTVCC PGOOD 4.7µF 95 INTVCC PGOOD1 PGOOD2 VIN VIN VOUT1 VOUT 4.5V TO 16V 22µF + 90 100µF 470µF 3.3V/50A 25V 120k VOUTS1 6.3V 6.3V ×4 TEMP DIFFOUT 85 TRACK1 V TRACK2 FB1 80 0.1µF INTVCC f VFB2 SET LTM4650A 13.3k EFFICIENCY (%) COMP1 75 COMP2 PINS NOT USED IN RUN1 VOUT2 + 70 12VIN, 3.3VOUT, 600kHz THIS CIRCUIT: 100µF RUN2 DIFFP 470µF 5VIN, 3.3VOUT, 600kHz CLKOUT 6.3V 6.3V 65 EXTV PHASMD DIFFN CC 0 10 20 30 40 50 SW1 SGND GND MODE_PLLIN LOAD CURRENT (A) SW2 4650A TA01a VOUTS2 4650A TA01b 4650afb For more information www.linear.com/LTM4650A 1
FEATURES DESCRIPTION
n
Dual 25A or Single 50A Output
The LTM®4650A is a dual 25A or single 50A output switching n
Input Voltage Range: 4.5V to 16V
mode step-down DC/DC µModule® (micromodule) regula- n
Output Voltage Range: 0.6V to 5.5V
tor with ±1% total DC output error. Included in the package n
±1% Maximum Total DC Output Error Over Line,
are the switching controllers, power FETs, inductors and
Load and Temperature
all supporting components. Operating from an input volt- n
Higher Light Load Efficiency and Wider V
age range of 4.5V to 16V, the LTM4650A supports two
OUT Range Than LTM4650-1
outputs with an output voltage range of 0.6V to 5.5V, each n
Differential Remote Sense Amplifier
set by a single external resistor. Its high efficiency design n delivers up to 25A continuous current for each output.
Current Mode Control/Fast Transient Response
n Fast internal control loop compensation allows for fast
Multiphase Parallel Current Sharing Up to 300A
n transient response to minimize output capacitance when
Internal Temperature Monitor
n powering FPGAs, ASICs, and processors.
Pin Compatible with the LTM4620A (Dual 13A, Single 26A) and LTM4630A (Dual 18A, Single 36A)
Fault protection features include overvoltage and over- n Adjustable Switching Frequency or Synchronization current protection. The LTM4650A is offered in 16mm n Overcurrent Foldback Protection × 16mm × 4.41mm LGA and16mm × 16mm × 5.01mm n Selectable Burst Mode® Operation, Pulse-Skipping BGA packages. Mode Operation
LTM4650 Product Family Selection Table
n Soft-Start/Voltage Tracking
VIN VOUT COMPEN- DC VOUT
n Output Overvoltage Protection
RANGE RANGE IOUT SATION ACCURACY
n 16mm × 16mm × 4.41mm LGA and LTM4650 Internal 1.5% 16mm × 16mm × 5.01mm BGA Packages 4.5V to 0.6V to LTM4650-1B 15V 1.8V External LTM4650-1A 25A × 2 0.8%
APPLICATIONS
LTM4650A 4.5V to 0.6V to Internal 16V 5.5V 1% LTM4650A-1 External n Telecom and Networking Equipment All registered trademarks and trademarks are the property of their respective owners. Protected n Storage and ATCA Cards by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending. n Industrial Equipment
TYPICAL APPLICATION 50A, 3.3V Output DC/DC µModule Regulator 3.3VOUT Efficiency vs IOUT
10k 100 INTVCC PGOOD 4.7µF 95 INTVCC PGOOD1 PGOOD2 VIN VIN VOUT1 VOUT 4.5V TO 16V 22µF + 90 100µF 470µF 3.3V/50A 25V 120k VOUTS1 6.3V 6.3V ×4 TEMP DIFFOUT 85 TRACK1 V TRACK2 FB1 80 0.1µF INTVCC f VFB2 SET LTM4650A 13.3k EFFICIENCY (%) COMP1 75 COMP2 PINS NOT USED IN RUN1 VOUT2 + 70 12VIN, 3.3VOUT, 600kHz THIS CIRCUIT: 100µF RUN2 DIFFP 470µF 5VIN, 3.3VOUT, 600kHz CLKOUT 6.3V 6.3V 65 EXTV PHASMD DIFFN CC 0 10 20 30 40 50 SW1 SGND GND MODE_PLLIN LOAD CURRENT (A) SW2 4650A TA01a VOUTS2 4650A TA01b 4650afb For more information www.linear.com/LTM4650A 1
